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Dynamic Strength of Iron at High Pressures and Strain Rates

Gandhi, Vatsa and Ravindran, Suraj and Ravichandran, Guruswami (2022) Dynamic Strength of Iron at High Pressures and Strain Rates. Physical Review Letters, 128 (1). Art. No. 015705. ISSN 0031-9007. doi:10.1103/physrevlett.128.015705.

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Accurate modeling of meteorite impacts, and deformation of planetary cores require characterization of the flow strength and in-elasticity of iron in its different phases. In this Letter, we investigate the flow strength of both the ambient α phase and high-pressure ε phase of iron at strain rates of 1 × 10⁵ s⁻¹ and pressures up to 42 GPa using high-pressure–pressure shear plate impact experiments. We report the strength of the ε iron to be significantly higher than α phase but consequently one order smaller than the previously reported dynamic strength at high pressures. The complete stress-strain response of the ε phase is reported for the first time.

Item Type:Article
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URLURL TypeDescription
Gandhi, Vatsa0000-0002-6752-113X
Ravindran, Suraj0000-0003-2930-7906
Ravichandran, Guruswami0000-0002-2912-0001
Additional Information:© 2022 American Physical Society. (Received 9 July 2021; revised 25 October 2021; accepted 17 December 2021; published 7 January 2022) The authors gratefully acknowledge the support of DOE/NNSA Award No. DE-NA0003957.
Funding AgencyGrant Number
Department of Energy (DOE) National Nuclear Security AdministrationDE-NA0003957
Issue or Number:1
Record Number:CaltechAUTHORS:20220118-839174000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112961
Deposited By: George Porter
Deposited On:19 Jan 2022 20:51
Last Modified:19 Jan 2022 20:51

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